[Hypersensitivity pneumonitis-like disease caused by exposure to Mycobacterium avium complex in bathtub water at home: a case report].

We report here a case of hypersensitivity pneumonitis-like disease in an adult, likely due to exposure to Mycobacterium avium complex (MAC) in his bathtub water at home. A 63-year-old man was referred to our hospital with exertional dyspnea. Chest computed tomography showed bilateral, diffuse, centrilobular ground-glass nodules.

Specific high-resolution computed tomography findings associated with sputum smear-positive pulmonary tuberculosis.

Objectives: This study aimed to evaluate whether high-resolution computed tomography (HRCT) could predict the results of a sputum smear in patients with active pulmonary tuberculosis.

Methods: Forty-eight patients with active pulmonary tuberculosis were divided into 2 groups: sputum smear-positive (n = 25) and -negative (n = 23). The HRCT findings were retrospectively reviewed, focusing on the presence or absence of features previously reported to indicate active pulmonary tuberculosis, including ground-glass opacity, cavitation, centrilobular opacity, and air space consolidation.